With the male population of Mars on the decline, the future of the red planet rests squarely in the hands of a long-legged alien named Nyah (Patricia Laffan), who's come to Earth -- specifically, the Scottish moors -- in search of virile, able-bodied men. Their mission -- should they choose to accept it -- is to travel to space to propagate the species. Not surprisingly, the Scotsmen's women put up a fight.